1.	Simplify 1 Simplify the following expression: $$ \left(-3 - -6\right)\left(-4 - -3\right) - 2\left(-5 - 1\right) $$ Correct Answer $$ 9$$ or 9.00000

2.	Simplify 2 Simplify the following expression: $$ \frac{-1 - 6 - \left(3 + 6\right)}{{\left(\frac{-3}{-5}\right)}^{2}} $$ Correct Answer $$ \frac{-400}{9}$$ or -44.4444

3.	Fractions 1 Simplify the following expression: $$ \frac{1}{5} + \frac{-2}{3} $$ Correct Answer $$ \frac{-7}{15}$$ or -0.4666666666666666

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{-1}{5}}{\frac{6}{4}} $$ Correct Answer $$ \frac{-2}{15}$$ or -0.13333333333333333

5.	Significant figures 1. Write the following to 4 significant figures: 20.059073 Correct Answer 20.06 or $$2.006\times10^{1}$$ 2. Write the following to 3 significant figures: 1618.1386 Correct Answer 1620 or $$1.62\times10^{3}$$

6.	Standard Form 1. Write the following in standard form to 5 significant digits: 0.0000148751 Correct Answer $$1.4875\times10^{-5}$$ 2. Write the following in standard form to 5 significant digits: 0.000637745 Correct Answer $$6.3775\times10^{-4}$$

7.	Significant figures 1. Write the following in preferred standard form to 3 significant digits: 0.08258 Correct Answer $$82.6\times10^{-3}$$ 2. Write the following in preferred standard form to 3 significant digits: 68628 Correct Answer $$68.6\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{2 + 1 - (-4)}{2\frac{2}{4}} $$ Correct Answer $$ 7$$ or 7.00000

9.	Simplify 1 Simplify the following expression: $$ \left(5 - -4\right)\left(-5 + 1\right) + {\left(-5 - -3\right)}^{2} $$ Correct Answer $$ -32$$ or -32.0000

10.	Simplify 2 Simplify the following expression: $$ {\left(-6 + -5\right)}^{2} - \frac{2 - 3}{-3 + 2} $$ Correct Answer $$ 120$$ or 120.000